Fibre Flashcards
what does BFA stand for
bare fibre adaptor
what does SC stand for
subscriber connector
what does STPC stand for
straight tip physical contact
what does FCPC stand for
face contact/physical contact
what does LC stand for
Lucent connector
what does MTRJ stand for
mechanical transfer registered jack
what does APC stand for
angle physical connector
what is micro bending?
micro bends are caused when external pressure causes any amount of permanent damage to the core/cladding interface
what is macro bending?
caused by exceeding the bend radius of the cable
name 2 items/tools you would use to prepare a primary coated fibre for splicing
eye protection
rule or template
IPA
lint free wipes
3 step stripper
cleaver
cinbin
what is the main purpose of the primary coating
to protect the core and the cladding
why is spare fibre coiled inside a patch panel
to allow for re-termination possible
what is the purpose of the v-groove of a fusion splicer
to locate and hold the fibre
name 2 items/tools you would use to prepare a secondary coated fibre for splicing?
eye protection
rule or template
shears
3 step stripper
cleaning solutions/lint free wipes
cleaving tool
cinbin
the class of laser being used as a light source can be determined by what
the attached safety label
what are the 4 hazards
light sources
equipments
chemicals
glass
name a type of photodiode used in fibre optics
P-I-N photo diode
avalanche photo diode
P-N photo diode
what colour is used for OM1
Grey
what colour is used for OM2
orange
What colour is used to identify OM3/OM4
Aqua
what colour is used for OM5
Lime
what colour is used for OS1a/OS2
Yellow
what colour is used to identify an APC connector
Green
for what purpose is loose tube cable used?
external connection between buildings in horizontal plane
advantages of singlemode fibre over muiltimode
lower attenuation over long distance
much larger bandwidth
wider repeater spacing
eliminates modal dispersion
list 2 safe working practices when working with chemicals
do not inhale
do not ingest
do not smoke or use around a naked flame
ventilate working area well
what is one of the drawbacks of continuity testing with VLS
only gives a visible indication
does not give a loss value
does not give a distance measurement
which part of an all-glass fibre has a variable diameter
the core
what must you check before commencing testing on fibre
ensure the fibre is not carrying live data
remove tx & rx
ensure you have the correct fibre test leads
what are the two indexes of multi-mode fibre
stepped index
graded index
